on statement logging to make sure and see if I can get this into a
smaller reproducible case.
From: Rick Hillegas [mailto:rick.hille...@gmail.com]
Sent: Tuesday, September 19, 2017 7:55 PM
To: derby-dev@db.apache.org; Bergquist, Brett
Subject: Re: Any idea why a sequence is getting "Derby
I have a simple application that is running with no other access to the
database. A sequence is defined
CREATE SEQUENCE LOG_ENTRY_SEQUENCE AS BIGINT START WITH 1 MINVALUE 1 CYCLE
The application is retrieving the next sequence number with a "VALUES (NEXT
VALUE FOR LOG_ENTRY_SEQUENCE)"
I agree Bryan. I am trying both routes in going to provide some more detailed
monitor at the customer site as well as working on trying to simulate the same
access pattern and hopefully get something reproducible.
So more insight. This table would have had a high insert rate and probably
Thanks Bryan. I am looking at all things :) The fact that it is not
reproducible with a copy of the database is a hinderance but also can indicate
something external.
The interesting thing is that the same query with the same parameters was run
40 times over about an 8 hour period with
looking at what triggers the statistics
update and if it might be at play here.
Thanks
Katherine
Sent from my iPhone
On Jun 5, 2017, at 12:04 PM, Bergquist, Brett
<bbergqu...@canoga.com<mailto:bbergqu...@canoga.com>> wrote:
Background:
· A large database approx
Background:
* A large database approximately 750G
* derby.storage.pageCacheSize=64000
* Inserts going into the database about 125/second
* Other database updates and deletes are being performed at a lower
rate.
A query is run by the customer that does not
'm glad to hear that this tool was useful on an old database. Some comments
inline...
On 8/7/16, 5:33 PM, Bergquist, Brett wrote:
> Mike, Rick, Bryan, others. There was definite corruption in one page for
> one table:
>
> 421677 |HARDWARE
w if describe prints the columns in the order they are
> actually stored in the db?
>
> if you have unique keys and the indexes are good, there may be some ways to
> better get at the data.
>
> /mikem
>
> On 7/27/2016 7:16 AM, Bergquist, Brett wrote:
>> I wrote a tool
l Message-----
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Wednesday, July 27, 2016 2:18 PM
To: derby-dev@db.apache.org
Subject: RE: Need some help in trying to figure out a corrupt database
More info. I looked to see what filenames are for a newly created database
and 'c470.dat' co
that I am having issues with.
So it appears the tool is looking for a 'SYSUSERS' table, that does not exist
when the database is old and upgraded many times.
-Original Message-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Wednesday, July 27, 2016 1:57 PM
To: derby-dev
I will try to get that Brian. Unfortunately, the database is 470GB so moving
it around and accessing it is not trivial.
I also tried to use the tool from
https://issues.apache.org/jira/browse/DERBY-6136
When I run this tool I get an error that looks like:
ij> connect
I wrote a tool to call SYSCS_UTIL.SYSCS_CHECK_TABLE on each table in the
database and not just stop on error.
I have a database returns the error:
Checking CORE_V1.DEVICE_ENTITY failed with exception: Restore of a
serializable or SQLData object of class , attempted to read more data
Thanks for the explanation Bryan.
-Original Message-
From: Bryan Pendleton [mailto:bpendleton.de...@gmail.com]
Sent: Tuesday, July 19, 2016 9:53 AM
To: derby-dev@db.apache.org
Subject: Re: [Java DB - testing] Failure continuous trunk (rev 175)
> So the message from
16 5:57 AM, Bergquist, Brett wrote:
> Where does one find this build job so that the failures can be looked at?
>
Hi Brett,
It's a little bit tricky.
You can find information about the Apache build and test system here:
http://db.apache.org/derby/derby_tests.html
If you follow
Where does one find this build job so that the failures can be looked at?
-Original Message-
From: ingemar.ab...@oracle.com [mailto:ingemar.ab...@oracle.com]
Sent: Tuesday, July 19, 2016 2:20 AM
To: derby-dev@db.apache.org
Subject: [Java DB - testing] Failure continuous trunk (rev
Thanks Kristian for pointing me in the right direction. I believe I have found
some of the examples that you mentioned and can progress from there.
> On Jul 2, 2016, at 6:15 AM, Kristian Waagan <krist...@apache.org> wrote:
>
> Den 02.07.2016 00.08, skrev Bergquist, Bre
I opened:
https://issues.apache.org/jira/browse/DERBY-6896
I wrote that i need some help writing a test case whereby the test case needs
to connect to the network server, perform some XA transaction work without
completing, and abnormally exiting. I don’t know how to do this within the
Resending because I did not see this appear on the list probably because I sent
from my home account.
—
While coming up with a fix for
I see this code in XATransactionState.java:
/**
* This function is called from the timer task when the transaction
* times out.
*
* @see
I figured to write a test to show the failure which is the case with the
current release of Derby and then once I have the fix, then the test will pass.
I attached a patch with the changes for the test for the issue along with the
supporting DerbyWatchdog.java that detects the Java level
a causes the deadlock and the watchdog
detects the deadlock and then does a System.exit(1) to kill the test for now.
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Friday, June 24, 2016 5:06 PM
To: derby-dev@db.apache.org
Subject: RE: How should one handle a test case that when it fails
return false;
}
}
But this is failing with an "java.security.AccessControlException: access
denied ("java.lang.management.ManagementPermission" "monitor")
Any ideas? There is probably a security policy that I need to update but have
no idea where that would be?
From: Bergquist
I am writing a test case for
https://issues.apache.org/jira/browse/DERBY-6879
Which if written correctly will cause a deadlock in the derby network server.
How should this test case recover from this? System.exit(1)?
The test case will never continue because of the deadlock and the derby
uot;clean" seem to remove the built jars and had to
search though the ant build script to find the target "cleanjars".
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Thursday, June 23, 2016 11:52 AM
To: derby-dev@db.apache.org
Subject: Need some help with getting tests to
I have to say I am always confused when I try to figure out how to run tests.
For just a quick burn test, I downloaded the trunk source, did
ant all
ant build-test-jars
ant junit-all
And I get:
C:\src\derby>ant junit-all
Buildfile: C:\src\derby\build.xml
junit-init-nocp:
[mkdir] Created
So thoughts and some questions.
Looking at the derby network client code, the Connection is synchronized on
while a statement is being executed. For example from ClientConnection.java:
public ResultSet executeQuery(String sql) throws SQLException {
try
{
https://issues.apache.org/jira/browse/DERBY-3908
I have been researching how this can be done as well and I do follow how it
could be done in embed mode. However I really need this to work in network
mode. To do so seems to require that the DRDAConnThread be able to receive a
message from
Could someone take a look at the comment that I added for
https://issues.apache.org/jira/browse/DERBY-6879
Basically if we change the XATransactionState.run method to synchronize first
on the "xaState.conn" (ie. the EmbedConnection) first, then this problem does
not occur.
This is a very
are.
-Original Message-
From: Kristian Waagan [mailto:kristwaa.apa...@gmail.com]
Sent: Saturday, April 23, 2016 4:22 PM
To: derby-dev@db.apache.org
Subject: Re: Is there any debug logging available when a database is being
recovered
Den 20.04.2016 16.46, skrev Bergquist, Brett:
> It took lon
It took longer (and never finished) to process the recovery logs file that it
did to restore the database from the previous night from backup (that took 6
hours to "untar") At about 14 hours, the recovery log files were not finished
processing so we had to give up and restore from backup.
We are doing a “truss -p 2>&1 | grep open” but what I am seeing right now
is that one complete pass was made through the logs and I thought that it was
about done. Now it is going into a pattern where it processes something like
log359.dat
log358.dat
…
Another issue with about 1100 log files needing to be processed after a restart
of the database network server. What I would like to know is if there is any
logging that can tell when pass the database recovery is on, what percentage is
done, etc. Some feedback that can be used to determine
On 3/25/2016 12:35 PM, Bergquist, Brett wrote:
Shutdown would not work. It was hung on the shutdown as well. Actually the
time to recover is going to be 50 hours which we don’t have. We have had to
go back to a backup of the database two days ago since the backup of the
database done last
. So what
is ever going to clean that up. The XAResource.recover never sees those
transactions.
On Mar 25, 2016, at 1:35 PM, Katherine Marsden
<kmars...@apache.org<mailto:kmars...@apache.org>> wrote:
On 3/25/2016 9:39 AM, Bergquist, Brett wrote:
Hey Kathey, that for taking the tim
ache.org
Subject: Re: Need help with clearing a XA transaction ! Important
It's been quite a while, and I don't even have Derby setup but I'll ask some
questions.
Do you see the same behavior with embedded?
With Network Server, in your test environment, does the transaction persist if
you bounce
I have a database with a stuck XA transaction. Derby 10.9.
I am able to reproduce this problem with two test programs. In the first
program I do:
try {
System.out.println("Connection to the database");
XAConnection xaConnection = null;
Connection
t happened in your
case, but i would always consistency check if there is a problem.
/mikem
On 9/4/2015 7:56 AM, Bergquist, Brett wrote:
> Thanks for the input!
>
> There is no possibility of running the consistency check on the customer's
> database on their system as it ne
Answering my own question. I was able to use ALTER TABLE DROP PRIMARY KEY on
the table and then ALTER TABLE ADD PRIMARY KEY to recreate the backing index.
-Original Message-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Thursday, October 22, 2015 9:13 AM
To: derby-dev
e (like backup/virus/... vs the sever), but mostly on
windows OS vs unix based ones.
Getting a partial page read is a very weird error for derby as it goes out of
its way to write only full pages.
On 9/3/2015 5:39 PM, Bryan Pendleton wrote:
> On 9/3/2015 3:35 PM, Bergquist, Brett wrote:
>&
A production system with a database of about 400G received this error today and
it appears that Derby shutdown parts of itself because from that point on it
was spitting out errors saying it could not find the database. The system was
restarted and came up clean and is working with no issues
I will try to update that shortly. Thanks.
-Original Message-
From: Bryan Pendleton [mailto:bpendleton.de...@gmail.com]
Sent: Wednesday, September 02, 2015 11:08 PM
To: derby-dev@db.apache.org
Subject: Re: Need help understanding a database deadlock that was detected
> I guess what I
Thanks Bryan.
I guess what I was expecting to see was the statement(s) were 50631 was
getting a lock on the MANAGED_HARDWARE_SUMMARY. I turned on statement logging
and see the issue. Your help here on how to read this output has help quite a
bit though. I did not understand that the
Derby 10.9.1.0
Here is the output from the derby.log:
Wed Sep 02 16:42:17 EDT 2015 Thread[DRDAConnThread_14,5,main] (XID = 50633),
(SESSIONID = 2110), (DATABASE = csemdb), (DRDAID =
NF01.D5E2-4183279662650783751{166}), Cleanup action starting
Wed Sep 02 16:42:17 EDT 2015
Derby 10.9.1.0
I am battling an OutOfMemory error that periodically occurs. I believe it is
triggered by a problem in my code that keeps a set of locks for too long and
another thread from another client interaction fails to acquire the locks that
it needs and triggers an lock timeout error.
I am having an out of memory condition on Derby 10.9.2.0 in our production
environment. Derby is given 8G maximum heap but I am able to get a heap dump
periodically and analyze it via Eclipse Memory Analyzer.
I see a couple of strange things and was wondering if I can attach a screen
shot
| 240
| 4,104
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Tuesday, May 19, 2015 1:39 PM
To: derby-dev@db.apache.org
Subject: Having an out of memory condition on Derby 10.9.2.0
I am having
I am not speaking for the Derby developers but I do know that contributions are
most welcome. I have reported a few bugs and also recently decided that I
wished (and others as well) that Derby had a rolling log file feature. So with
the help of the developers, I was able to implement such a
I am trying to figure out an issue where the optimizer is taking a long time to
compile a statement and want to make sure that the subsequent times through it
will use the cached statement if present in the statement cache.
I prepare the statement and then I look at the cache with:
SELECT *
happen. Rick, Knut?
The invalid statement is a gigantic piece of sql which depends on a lot of
objects. The invalidation of any of those objects could have made the statement
invalid.
Dag
On 07. aug. 2014 18:51, Bergquist, Brett wrote:
I am trying to figure out an issue where the optimizer
I am starting on a project to add the capability to the derby replication to be
able to acquire the database to replicate automatically by the slave and I
would like to be able to run two instances of the network server so that I can
debug the protocol between the two when the slave is going to
@db.apache.org
Cc: Bergquist, Brett
Subject: Re: Question on how to debug two instances of derby off the trunk
On 4/22/14 7:31 AM, Bergquist, Brett wrote:
I am starting on a project to add the capability to the derby
replication to be able to acquire the database to replicate
automatically by the slave
the trunk
On 22. april 2014 16:31, Bergquist, Brett wrote:
I am starting on a project to add the capability to the derby replication to be
able to acquire the database to replicate automatically by the slave and I
would like to be able to run two instances of the network server so that I can
Just wondering as some of the bugs that I reported and have been fixed are not
going to be in this release. Basically without these, the release is not
useful to me at least and i will have to continue to build and patch myself.
Take these for example:
I guess it will be 10.11, right? Is there a roadmap when that might be
produced? Just wondering as I will have to patch 10.10.2.1 with this feature
myself I guess.
Brett
Thanks for your time Rick.
On Mar 28, 2014, at 1:36 PM, Rick Hillegas rick.hille...@oracle.com wrote:
On 3/28/14 10:10 AM, Bergquist, Brett wrote:
Just wondering as some of the bugs that I reported and have been fixed are
not going to be in this release. Basically without these, the release
or make no progress for a very long period
of time.
Thanks for any insight that you might provide.
On Mar 13, 2014, at 3:32 PM, Bergquist, Brett
bbergqu...@canoga.commailto:bbergqu...@canoga.com wrote:
See https://issues.apache.org/jira/browse/DERBY-6510
Basically it looks like for some reason
a chance to look at the code to
verify either of these theories.
Hopefully, others can comment also.
On 03/14/2014 12:33 PM, Bergquist, Brett wrote:
Sorry to be a persistent but the this is a very serious issue that I
am seeing in production and would just like some guidance on where to
look
of these theories.
Hopefully, others can comment also.
On 03/14/2014 12:33 PM, Bergquist, Brett wrote:
Sorry to be a persistent but the this is a very serious issue that I
am seeing in production and would just like some guidance on where to
look in the source for a possible issue.
My assumption
Unfortunately, introducing something into the production environment is not
possible. I am in the process of trying to build a simulation of that
environment but that is also difficult as the application is an Element
Management System and in the network there are about 40K pieces of our
Brian, after reading and reading and reading, I am going to investigate this
patch more. Amy's comment in DERBY-1905
As described more in the discussions for DERBY-2130, I removed an
if-block from OptimizerImpl that actually causes an infinite loop in
lang/innerjoin.sql (I
Mike, I am going to spend some time investigating the code. From you
developers help I think I have satisfied it to myself that there is some
condition where there a looping or something similar and will investigate the
code in this area.
I much appreciate the help that you have given.
Brett
See https://issues.apache.org/jira/browse/DERBY-6510
Basically it looks like for some reason the system gets stuck in trying to
create the query plan. Copied from the JIRA:
We had an issue today in a production environment at a large customer site.
Basically 5 database interactions became
replication break because of a
system failure
Rick Hillegas rick.hille...@oracle.com writes:
On 1/15/14 8:19 AM, Bergquist, Brett wrote:
Any thoughts on this? Is this an approach that is worth looking at?
Hi Brett,
I haven't studied the internals of Derby's online backup, but from a
high level
-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Tuesday, January 14, 2014 12:49 PM
To: derby-dev@db.apache.org
Subject: RE: Question on recoverying after replication break because of a
system failure
Actually the expensive part is having the master system down to ensure a
completely
of the database up to the
point where it is consistent with the master, replication would be performed.
Any thoughts on this?
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Friday, January 10, 2014 4:45 PM
To: derby-dev@db.apache.org
Subject: Question on recoverying after
proposal. Some comments inline...
On 1/10/14 1:45 PM, Bergquist, Brett wrote:
The reason I am posting to the dev list is that I might want to look
into improving Derby in this area.
Just so that I am understand correctly, the steps for replication are:
*Make a copy of the database
The reason I am posting to the dev list is that I might want to look into
improving Derby in this area.
Just so that I am understand correctly, the steps for replication are:
* Make a copy of the database to the slave
* Start replication on the slave and on the master
Now
as the database from
which it was taken?
Thanks,
Myrna
On Mon, Oct 28, 2013 at 1:54 PM, Bergquist, Brett
bbergqu...@canoga.commailto:bbergqu...@canoga.com wrote:
I have always assumed that a backup create by
SYSCS_UTIL.SYSCS_BACKUP_DATABASE system procedure creates a fully functional
backup copy
, so if the test patch is related I’d say go ahead and attach
it to the existing issue.
D
On 27. okt. 2013, at 23:19, Bergquist, Brett bbergqu...@canoga.com wrote:
I modified the ErrorStreamTest.java to cleanup the log files that are
causing an error because of the order the tests
I have always assumed that a backup create by
SYSCS_UTIL.SYSCS_BACKUP_DATABASE system procedure creates a fully functional
backup copy of the database. I have used it as such with no issues. I have
replaced the original database with the backup and the continued. Not that I
did not try
I modified the ErrorStreamTest.java to cleanup the log files that are causing
an error because of the order the tests are run. Do I supply this as a patch
to DERBY-6350 or is another JIRA opened and the patch attached there?
Thanks for the help
Brett
After some fits and starts and learning, I believe the patch is complete. It
applies cleanly against the trunk and the tests including the new rolling log
file tests run with no errors.
https://issues.apache.org/jira/browse/DERBY-6350
The patch file to use is the one
Thanks Rick I appreciate the time you take to answer my questions!
On Sep 25, 2013, at 9:45 PM, Rick Hillegas rick.hille...@oracle.com wrote:
Hi Brett,
Some responses inline...
On 9/25/13 5:55 PM, Bergquist, Brett wrote:
When trying to open an existing database with the derby that I
I am trashing about trying to figure out how to correctly run the tests after
building the trunk code. I want to run the engine/ErrorStreamTest as a single
test. How do I go about doing that?
I followed the procedure on
When trying to open an existing database with the derby that I built from the
trunk I get:
ERROR XJ040: Failed to start database '/Users/brett/.netbeans-derby/csemdb'
with class loader sun.misc.Launcher$AppClassLoader@39172e08, see the next
exception for details.
ERROR XCW00: Unsupported
I am trying to implement a new rolling file error log handler and have added a
class to org.apache.derby.impl.services.stream package. I do a
ant clobber
ant buildsource
ant buildjars
and my class does not end up in the derby.jar under jars/sane. I think it has
to do with something about
Perfect.
Thanks as I would not have found that I don't think.
From: Katherine Marsden [mailto:kmarsdende...@sbcglobal.net]
Sent: Thursday, September 19, 2013 12:55 PM
To: derby-dev@db.apache.org
Subject: Re: How can I get a new class into derby.jar?
On 9/19/2013 8:07 AM, Bergquist, Brett wrote
https://issues.apache.org/jira/browse/DERBY-6350
I implemented this as part of the Derby core engine. I put my classes in:
java/engine/org/apache/derby/impl/services/stream/RollingFileStream.java
java/engine/org/apache/derby/impl/services/stream/RollingFileStreamProvider.java
As there really
Hillegas [mailto:rick.hille...@oracle.com]
Sent: Thursday, September 12, 2013 10:39 AM
To: derby-dev@db.apache.org
Subject: Re: Is there some way an external class can find where
derby.system.home points to
On 9/10/13 5:42 PM, Bergquist, Brett wrote:
Sorry for taking so long to get back
/13 5:35 AM, Bergquist, Brett wrote:
I finally broke down and wrote RollingFileStream which provides (and
borrows) most of the functionality of java.logger.FileHandler to provide a
rolling file stream. Having derby.log grow forever on long running systems
is just not acceptable anymore
...@sbcglobal.net
wrote:
On 9/6/2013 5:35 AM, Bergquist, Brett wrote:
I finally broke down and wrote RollingFileStream which provides (and
borrows) most of the functionality of java.logger.FileHandler to provide a
rolling file stream. Having derby.log grow forever on long running systems
I finally broke down and wrote RollingFileStream which provides (and borrows)
most of the functionality of java.logger.FileHandler to provide a rolling file
stream. Having derby.log grow forever on long running systems is just not
acceptable anymore ;) Realistically, I would like to provide
I am just wondering if while the optimizer is producing a plan if a cost of
0.0 should ever be seen. Thinking naively, it seems to me that all join
plans and all access paths have some sort of cost which should be greater than
0.0. From my testing over the last few days, when a plan comes up
).
On Aug 27, 2013, at 12:46 PM, mike matrigali mikema...@gmail.com wrote:
On 8/27/2013 9:43 AM, Rick Hillegas wrote:
On 8/27/13 8:18 AM, Bergquist, Brett wrote:
I am just wondering if while the optimizer is producing a plan if a
cost of 0.0 should ever be seen. Thinking naively, it seems to me
, Bergquist, Brett wrote:
Mike I would love to open a Jira but having a reproducible case is important
as I realize. Right now, the reproducible database is 2Gb compressed which
is really not practical to upload.
My goal right now is to fix the problem. The problem is in production
Thanks for taking the time to respond Mamta. I am running a patched version
of 10.9.1.0. The patches have to do with issues that I provided patches for to
Derby relating to LogicalConnection deadlocks. These patches were just
incorporated as I saw emails indicating so just the other day.
I just enabled the derby.storage.indexStats.debug.keepDisposableStats=true in
derby.properties and restarted the network server. I am running with straight
10.9.1.0 right now and have a database with exactly two tables. I have used
the syscs_util.syscs_drop_statistics to drop the statistics
11:04 AM, Bergquist, Brett wrote:
I just enabled the
derby.storage.indexStats.debug.keepDisposableStats=true in
derby.properties and restarted the network server. I am running with
straight 10.9.1.0 right now and have a database with exactly two tables.
I have used
.COSEDDROPPROFILEDSCPTABLEBUNDLE_COSEDDROPPROFILEDSCPTABLEENTRY.
COSEDDROPPROFILEDSCPTABLEBUNDLE_ID value from that row is the unique
CORE_V1.CONFIGURATION_BUNDLE2.ID value of the row to look up.
Why would Derby decide to do a table scan on CORE_V1.CONFIGURATION_BUNDLE2 in
this case?
On Aug 20, 2013, at 8:29 PM, Bergquist, Brett
in this type of query which is going to find exactly row in
the line times table and from that row, the order ID is obtained which is the
unique value to lookup in the orders table?
On Aug 21, 2013, at 9:13 AM, Rick Hillegas rick.hille...@oracle.com wrote:
On 8/21/13 5:20 AM, Bergquist, Brett wrote:
I am
I need some help. I have a database that is old and has been through multiple
upgrades of Derby. Now we are using Derby 10.9.1.0.
I have the following query which is not using an index that it should and is
instead using a table scan. Here is the query:
SELECT * FROM
.
-Original Message-
From: Rick Hillegas [mailto:rick.hille...@oracle.com]
Sent: Saturday, May 11, 2013 8:43 AM
To: derby-dev@db.apache.org
Subject: Re: Is there a unit test in Derby for the XPLAIN feature
On 5/11/13 4:28 AM, Bergquist, Brett wrote:
Is there a unit test in Derby for the XPLAIN
It depends :)
If the property ant.regexp.regexpimpl is not defined, it will default use the
org.apache.tools.ant.util.regexp.Jdk14RegexpRegexp implementation which is a
wrapper for java.util.regex package.
http://docs.oracle.com/javase/6/docs/api/java/util/regex/package-summary.html
and the
Is there a unit test in Derby for the XPLAIN feature? I would be interested in
know if it is passing if there is.
From: Bergquist, Brett [bbergqu...@canoga.com]
Sent: Tuesday, May 07, 2013 8:11 PM
To: derby-dev@db.apache.org
Subject: RE: Does the XPLAIN
Created https://issues.apache.org/jira/browse/DERBY-6216
-Original Message-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Tuesday, May 07, 2013 8:11 PM
To: derby-dev@db.apache.org
Subject: RE: Does the XPLAIN feature work in Derby 10.9.1.0
Okay, thanks. I will open
I am running Derby 10.9.1.0 and am trying to figure out a performance problem
with query taking too long. I don't actually want to run the query so from
the documentation, I try:
call syscs_util.syscs_set_runtimestatistics(1);
call syscs_util.syscs_set_xplain_schema('STATS');
call
Okay, thanks. I will open a JIRA on it.
From: Bryan Pendleton [bpendleton.de...@gmail.com]
Sent: Tuesday, May 07, 2013 7:54 PM
To: derby-dev@db.apache.org
Subject: Re: Does the XPLAIN feature work in Derby 10.9.1.0
I get the same result:
$ java -cp
: Re: Why is the optimizer choosing such a bad path
On 3/29/13 9:30 AM, Mike Matrigali wrote:
On 3/29/2013 5:28 AM, Bergquist, Brett wrote:
Mike I have a reproducible case but the database is 132GB so it is
not practical. I am willing to dig in and try to help debug this.
On the issue
Matrigali [mailto:mikem_...@sbcglobal.net]
Sent: Thursday, March 28, 2013 5:11 PM
To: derby-dev@db.apache.org
Subject: Re: Why is the optimizer choosing such a bad path
On 3/28/2013 6:38 AM, Bergquist, Brett wrote:
I tried adding:
derby.storage.indexStats.debug.keepDisposableStats=true
optimizer estimated row count: 0.00
optimizer estimated cost: 0.00
-Original Message-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Wednesday, March 27, 2013 8:42 PM
To: derby-dev@db.apache.org
Subject: RE: Why is the optimizer choosing
optimizer estimated cost: 14.34
-Original Message-
From: Bergquist, Brett [mailto:bbergqu...@canoga.com]
Sent: Thursday, March 28, 2013 8:33 AM
To: derby-dev@db.apache.org
Subject: RE: Why is the optimizer choosing such a bad path
Okay, I finally figured out that CALL
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